You want to write a script that prints your username and all group names you belong to. Which combination of commands will achieve this?

hard📝 Application Q15 of 15

Linux CLI - Users and Groups

A<code>id -un && id -G</code>

B<code>whoami -g && id -u</code>

C<code>echo $(whoami) && id -Gn</code>

D<code>whoami && id -G</code>

Step-by-Step Solution

Solution:

Step 1: Identify command to print username
whoami prints the current username. Using echo $(whoami) prints it clearly.
Step 2: Identify command to print group names
id -Gn prints all group names the user belongs to, separated by spaces.
Step 3: Evaluate options
echo $(whoami) && id -Gn correctly combines username and group names. whoami -g && id -u uses invalid whoami -g. id -un && id -G uses id -un (which prints username) and id -G (which prints numeric group IDs, not names). whoami && id -G prints username and numeric group IDs, not names.
Final Answer:
echo $(whoami) && id -Gn -> Option C
Quick Check:
Use whoami + id -Gn for username and group names [OK]

Quick Trick: Use whoami for username and id -Gn for group names [OK]

Common Mistakes:

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